Enhanced hydrogen generation from methanol aqueous solutions over Pt/MoO3/TiO2 under ultraviolet light

被引：51
作者：
Ma, Bao Jun [1 ]
Kim, Jin Su [2 ]
Choi, Chang Hyuck [1 ]
Woo, Seong Ihl [1 ,2 ]
机构：
[1] Korea Adv Inst Sci & Technol, Dept Chem & Biomol Engn, Grad Program BK21, Taejon 305701, South Korea
[2] Korea Adv Inst Sci & Technol, Grad Sch EEWS WCU, Taejon 305701, South Korea
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2013年 / 38卷 / 09期
基金：
新加坡国家研究基金会;
关键词：
Photocatalysis; Hydrogen evolution; Heterojunction; Z-scheme; Pt/MoO3/TiO2; WATER-SPLITTING SYSTEM; SHUTTLE REDOX MEDIATOR; VISIBLE-LIGHT; PHOTOCATALYTIC ACTIVITY; HETEROGENEOUS PHOTOCATALYSIS; TIO2; PHOTOCATALYSTS; SOLID-SOLUTION; SURFACE; PHASE; H-2;
D O I：
10.1016/j.ijhydene.2012.12.142
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The photocatalytic activity in hydrogen production from methanol reforming can be significantly enhanced by Pt/MoO3/TiO2 photocatalysts. Compared with Pt/P25, the photocatalytic activity of optimized Pt/MoO3/TiO2 shows an evolution rate of 169 mu mol/h/g of hydrogen, which is almost two times higher than that of Pt/P25. XRD and Raman spectra show that MoO3 are formed on the surface of TiO2. It is found that with the bulk MoO3 just formed, the catalyst shows the highest activity due to a large amount of heterojunctions and the high crystallinity of MoO3. The HRTEM image showed a close contact between MoO3 and TiO2. It is proposed that the Z-scheme type of heterojunction between MoO3 and TiO2 is responsible for the improved photocatalytic activity. The heterojunction structure of MoO3/TiO2 does not only promote the charge separation, but also separates the reaction sites, where the oxidation (mainly on MoO3) and reduction (on TiO2) reactions occurred. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：3582 / 3587
页数：6
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